Home / 7,102.78-10,654.18-2,172.40

Finding the Fourth Proportional to 7,102.78, 10,654.18 and 2,172.40

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Solution

The fourth proportional to 7,102.78, 10,654.18 and 2,172.40 is: 3,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,102.78 : 10,654.18 = 2,172.40 : x
  2. Step 2: Convert to fraction form
    7,102.78/10,654.18 = 2,172.40/x
  3. Step 3: Cross multiply
    7,102.78x = 10,654.18 × 2,172.40
  4. Step 4: Simplify right side
    7,102.78x = 23,145,140.63
  5. Step 5: Solve for x
    x = 23,145,140.63/7,102.78
  6. Step 6: Final answer
    x = 3,258.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.